Valve mechanism



Jan. 19 1926.`

1,569,852 H. L. COLBY l VALVE uscxmxsn Filed Nov. v, m23

operation ol` Said screws and which ma)v be held in any position ot adjustment bv lock nuts i-l and The nuts 2Q and are provided with ears to which are pivoted, as at ll and the opposite ends respectively of a sulgistantialljv straighteam bar 2G, Whereb)T said cam bar is supported and said nuts held against rotation When the screvvs Q0 and 21 are turned. liv operation ol the screws 2O and Q1, the positions of the upper and lower ends, respectively, oit the cam bar 2G, and consequently the inclination ol said cam bar to the slide 1l, ma),v be independently adjusted, one or both oi the pivots 3l and beine` received in a slot or slots in said cam bar, as shown at 36, in order to permit such adjustment. The cam bar 26 is formed with an edge `tlango 2T which is engaged b v a shoe 2S pivotallyIY mounted Within the bi'lurcated end Q5) of a rod 30 guided for longitudinal movement in a guide 31 termed on the b acket 12. rl`he opposite end of the rod 30 is connected with one arm of a bell crank lever 32 pivoted to the bracket 12 and the other arm of which is connected with the stem T5S of the valve 11.

then the slide 14 is moved verticallv7 under the control of the regulator, the rod 30 is moved lateralliY by the inclined cam bar Q6 to open and close the valve 11 through the bell crank lever 32 and valve stem 33, the engagement oit the shoe 2S with the llange QT providing lioi: a positive movement in both directions. As shown, the mechanism is arranged and adjusted to open the valve when the slide 14 moves upivardlv and to close the valve When said slide moves dovvn vvardlv, the range ol movement ol said slide being sull'ieientlv less than the vertical distance between the ends ol" the cam bar 2G to permit continuous operative engagement betiveen the shoe Qtl and flange 2T. Adj ustment ol the upper end of the cam bar b v means ott the screw 2O determines the limit ol closing movement olfA the valve, u'hile adjustment oil the lou'er end ol .said cam bar b v means o't' the scren- Q1 determines the limit of opening` movement of said valve. lrrespec'tive. hovreif'er, of these limits, it will be seen that the complete range ol' movement olt the .slide 1l is required in order to cause a movement ot the valve from one to the other. ll v 'ill also be seen that, while adinzituient ot' the cam bar varies the extent ol movement imparted to the valve by a given movement olE the operating slide, these movenu'nte, Ytor a ,given :u'ljuslment, bear a lined ratio to one another throughout their respeclive ranges.

Having thus described mi' invention, l claim:

1. The combination with a valve, ot au operating member therefor having:r a predetermined range of operative movement, and means connect-ing said operating member and valve for causing opening or closing,r movements of said valve proportional in amount to the extent ot' movement of said operating member throughout the range of operative movement olf the latter, said connecting means being adjustable to vary the limits ol' movement of said valve in either or both directions and thereby the extent ot movement oit said valve correspomling to a given movement ol' said operating member.

The combination with a valve, of an operating member therefor having a rango of operative movement between lixed limits, and means connecting said operating mem ber and falve lor causing opening or closing movements of said valve proportional in amount to the extent o'll movement of said ope atingI member throughout the range of operative movement et the latter, said connecting means being adjustable to vary both limits of movement of the valve independ ently.

The combination with a valve, of au operating member therefor havingr a range ot operative movement between tired limits, means operatively connecting said valve and operating member` whereby n'iovementot' the latter between its limits causes corresponding movement of the former between limits, and means whereinY both of said last iiauaal limits may be independently varied.

al. The combination with a valve, olE an operating` member therefor having' a predetermined range of operative movement, and means tamnectingl said operating member and valve Ator causingl opening or closingl movements of said valve in constant ratio to the movements ol" said operating member throughout the range ol operative moven'umt of the latter, said means including a cam and devices for adjustabl)T connecting said cam with said operatinfor member at a plurality oi point-s.

5. The combination with a valve, olt au operating,r slide, a rigid cam bar, means` including adjusting screws for connecting bol h ends ot said cam bar vilh raid slide, a sneu cooperating` with said cam bar and umvable tln'irebvv in both directions. and means` counected vrith said shoe l'oibpeniugr and closing said valve.

ln testimonj,Y uhereot l alli); mi signature.

l-IAROLD L. UOLBY.

Uil

ltlll lll] 

